Improvement in attachments to steam-boilers for burning naphtha



UNITED STATES PATENT. OFFICE.

HENRY PRATT, OF CHICAGO, ILLINOIS.

IMPROVEMENT IN ATTACHMENTS T0 STEAM-BOILERS FOR BURNING NAPHTHA.

Specification forming part of Letters Patent No. [54,902, dated September 8,1874; application filed May 18, 1874.

nois, have invented an Attachment to Steam-' Boilers for Burning Naphtha, of which'the following is a specification The object of my invention is to provide a a simple attachment to steam-boilers or their furnaces, by means of which naphtha or other light hydrocarbons may be consumed as fuel for generating steam; and it consists in an elbow-shaped casting, provided with a flange at one end for bolting it to the furnace front, and an air-valve at the other and pendent end. Naphtha enters it through a drip-pipe at V the front end, and a jet of live steam on a horizontal plane at the angle, for the double purpose of blowing in the fluid and drawing in suflicient atmosphericair to support combustion.

Flgure 1 is a perspective view. Fig. 2 1s a longitudinal section. v

In the drawing, A represents an L-shaped j" hollow casting, having a flange, a, at the front end, by means of which it maybe bolted to the furnace front of a steam-boiler, over an opening therein. In the pendent end is hung a butterfly-valve, B, to regulate the influent volume of air, above which a door, D, is hung,

through which the process of combustion may i be observed. b is a drip-pipe, tapped into the front top part of the casting A, and communicates with a vessel above it, containing a supply of naphtha or other light hydrocarbon, which is allowed to drip into the burner in a small volume, regulated by a suitable valve. 0 is a steam-jet pipe, horizontally tapped into the back end of the burner, and is supplied with live steam from the boiler, which is blown with great force through the contracted nozzle of the pipe 0 across the dropping naphtha, which it blows into the furnace, drawing in after it a volume of air, whose oxygen supports the combustion of the hydrocarbon, the proportion of air admitted being regulated by the air-valve. The number of burners required will, of course, vary with the size of the boiler.

What I claim as my invention, and desire to secure by Letters Patent, is-- The combination in a hydrocarbon burner of the L-shaped casting A, air-valve B, drippipe b, and steam-jet pipe 0, the L-shaped casting being provided with the observingdoor D, substantially as described.

HENRY PRATT.

Witnesses WM. H. LOTZ, HERMAN BISOHOFF. 

